Focus is on the development and technical support of Next Generation Firewall (NGFW) and Adaptive Security Appliance (ASA) virtual platforms.• Part of a small engineering team that conceptualized and introduced the first virtual ASA device. Initially developed for VMware ESXi. Follow-on projects added support for KVM and HyperV hypervisors.• Integrated the ASA and NGFW platforms into Microsoft Azure and Amazon AWS cloud fabrics.• Primary development responsibilities centered around… Show more Focus is on the development and technical support of Next Generation Firewall (NGFW) and Adaptive Security Appliance (ASA) virtual platforms.• Part of a small engineering team that conceptualized and introduced the first virtual ASA device. Initially developed for VMware ESXi. Follow-on projects added support for KVM and HyperV hypervisors.• Integrated the ASA and NGFW platforms into Microsoft Azure and Amazon AWS cloud fabrics.• Primary development responsibilities centered around boot-up, initialization, and day0 configuration behavior.• Implemented a secure storage device using the dm-crypt/cryptsetup/LUKS Linux packages by providing a layer of encryption to the virtual hard disk, since the virtual platforms did not support a hardware trust anchor.• Developed a central licensing model for containerized firewall services in Kubernetes. Used Google Protobufs over ZeroMQ for message exchange.• Engineering lead on a NGFWv scaling feature that allow customers to provision the cpu and memory requirements based on their throughput needs.• Provide support for E1000, VMXNET3, VIRTIO, IXGBEVF, and NetVSC network interface DPDK drivers.• Provide continual training, documentation, and technical guidance to customer facing support teams and junior level engineers.• Development tasks mainly implemented using C and C++ but also responsible for maintaining code written in Python, Bash, Perl, and some Go. Show less

Engineering member responsible for software infrastructure and features on the mid-range Integrated Service Router (ISR) and Aggregation Services Router (ASR) platforms.• Lead engineer supporting IOS-XE onboard ethernet interfaces and pluggable IO modules. Maintained and resolved software issues related to host-side device initialization, configuration, state and status monitoring functions.• Developed a proof-of-concept design, integrating a Broadcom tg3 Linux driver and a Cavium… Show more Engineering member responsible for software infrastructure and features on the mid-range Integrated Service Router (ISR) and Aggregation Services Router (ASR) platforms.• Lead engineer supporting IOS-XE onboard ethernet interfaces and pluggable IO modules. Maintained and resolved software issues related to host-side device initialization, configuration, state and status monitoring functions.• Developed a proof-of-concept design, integrating a Broadcom tg3 Linux driver and a Cavium Octeon MIPS processor, using a ‘doorbell’ delivery method to efficiently transfer packets between control and data planes.• Decoupled IO drivers from monolithic IOS and transitioned them over to linux userspace and kernel drivers.• First project in the group was to integrate an authentication proxy feature with a zone-based firewall service. The proxy would communicate with a AAA server via HTTP to validate user credentials before giving the user access to the network zone.• Development and sustaining tasks heavily reliant on existing IOS and BinOS software written in C. Show less

Hired into Cisco to support and develop features for Cisco VoIP products. Emphasis on SIP and H.323 protocols.• First few months was assigned to a quality initiative task force to address the bug backlog. Main focus was supporting H.323 gatekeeper code associated with the RAS protocol.• Part of a small team that developed an IP-IP Gateway. Primarily responsible for the H.245 media control signaling between call legs. Delivered both faststart and slowstart signaling methods.•… Show more Hired into Cisco to support and develop features for Cisco VoIP products. Emphasis on SIP and H.323 protocols.• First few months was assigned to a quality initiative task force to address the bug backlog. Main focus was supporting H.323 gatekeeper code associated with the RAS protocol.• Part of a small team that developed an IP-IP Gateway. Primarily responsible for the H.245 media control signaling between call legs. Delivered both faststart and slowstart signaling methods.• Implemented a H.225 RAS gatekeeper security feature to authenticate Location Request (LRQ) messages.• Developed the IP-IP Gateway IOS Command Lina Interface (CLI) configuration and exec commands.• Provided support for Cisco Call Manager with a focus on SIP line and trunk infrastructure. Technical liaison for SIP trunks. Represented Cisco in multiple SIPit events.• Implemented a DTMF out-of-band relay mechanism using the Key Pad Markup Language (KPML).• Received patents for DTMF to RFC2833 converter (US Patent 7,778,274), SIP detection and recovery using SIP re-invites (US Patent 8,254,552), and delayed media method for SIP (US Patent 7,701,971). Show less

Held various positions while at Bell Northern Research (BNR) and Nortel. BNR was the research and development arm that later merged into Nortel. I started my engineering career in the hardware group where I performed various roles such as verification testing, accept ownership of new products, support manufacturing, address customer found defects, and redesign hardware to reduce COGS. Eventually I transitioned into a software role developing and supporting the eXtended Peripheral Modules (XPM)… Show more Held various positions while at Bell Northern Research (BNR) and Nortel. BNR was the research and development arm that later merged into Nortel. I started my engineering career in the hardware group where I performed various roles such as verification testing, accept ownership of new products, support manufacturing, address customer found defects, and redesign hardware to reduce COGS. Eventually I transitioned into a software role developing and supporting the eXtended Peripheral Modules (XPM) and Universal Edge 9000 (UE9000) Media Gateway code base.Some notable development projects:• Delivered SONET carrier maintenance software for Nortel’s Spectrum peripheral. Used C and C++ to implement the diagnostic routines for OC-3, STS-3, STS-1, DS3, DS1, and VT1.5 carrier types.• Provided the hardware and firmware for a DTMF coin detection board. Created a FIR filter using a Texas Instruments TMS320 DSP to extract and validate coin tones. Integrated all backplane control logic into an Altera FPGA.• Implemented a DRAM memory card for a 911 operator controller card. Memory refresh circuitry and glue logic all implemented using a Xilinx FPGA. • Primary engineer for ATM driver development and messaging peripheral card support. Show less